5x+15=9-7x

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Solution for 5x+15=9-7x equation: 



5x+15=9-7x

We move all terms to the left:

5x+15-(9-7x)=0

We add all the numbers together, and all the variables

5x-(-7x+9)+15=0

We get rid of parentheses

5x+7x-9+15=0

We add all the numbers together, and all the variables

12x+6=0

We move all terms containing x to the left, all other terms to the right

12x=-6

x=-6/12

x=-1/2

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